Bug 225529 – [ Monterey Ventura wk2 ] scrollingcoordinator/mac/fixed-backgrounds/fixed-background-in-overflow-in-iframe.html is a constant text failure.

• Component: New Bugs
• Status: RESOLVED FIXED

[Robert Jenner]

scrollingcoordinator/mac/fixed-backgrounds/fixed-background-in-overflow-in-iframe.html

is a flaky text failure on BigSur Release wk2 on Apple Silicon Macs only.

HISTORY:
https://results.webkit.org/?suite=layout-tests&test=scrollingcoordinator%2Fmac%2Ffixed-backgrounds%2Ffixed-background-in-overflow-in-iframe.html

TEXT DIFF:
     (layout viewport (0,0) width=785 height=600)
     (min layoutViewport origin (0,0))
     (max layoutViewport origin (0,1416))
-    (behavior for fixed 0)
-    (frame hosting node
-      (frame scrolling node
-        (scrollable area size width=500 height=400)
-        (total content size width=500 height=400)
-        (last committed scroll position (0,0))
-        (scrollable area parameters
-          (horizontal scroll elasticity 0)
-          (vertical scroll elasticity 0)
-          (horizontal scrollbar mode 0)
-          (vertical scrollbar mode 0))
-        (synchronous scrolling reasons Has slow repaint descendant scrollers)
-        (layout viewport (0,0) width=500 height=400)
-        (min layoutViewport origin (0,0))
-        (max layoutViewport origin (0,0))
-        (behavior for fixed 0)
-        (overflow scrolling node
-          (scrollable area size width=405 height=305)
-          (total content size width=410 height=1020)
-          (last committed scroll position (0,0))
-          (scrollable area parameters
-            (horizontal scroll elasticity 0)
-            (vertical scroll elasticity 0)
-            (horizontal scrollbar mode 0)
-            (vertical scrollbar mode 0)
-            (allows horizontal scrolling 1)
-            (allows vertical scrolling 1))
-          (synchronous scrolling reasons Has slow repaint objects))))))
+    (behavior for fixed 0)))
https://build.webkit.org/results/Apple-BigSur-Release-AppleSilicon-WK2-Tests/r277174%20(1348)/scrollingcoordinator/mac/fixed-backgrounds/fixed-background-in-overflow-in-iframe-pretty-diff.html

[Radar WebKit Bug Importer]

<rdar://problem/77679410>

[Robert Jenner]

This problem is rarely occurring, and only appears to happen on Apple Silicon Macs. As such, I cannot reproduce these failures because I don't have access to said system type. Updated test expectations to Pass Failure here:

https://trac.webkit.org/changeset/277299/webkit

[Karl Rackler]

[ Mac wk2 arm64 ] scrollingcoordinator/mac/fixed-backgrounds/fixed-background-in-overflow-in-iframe.html is a flaky failure

Description:
scrollingcoordinator/mac/fixed-backgrounds/fixed-background-in-overflow-in-iframe.html is now flaky failing with Monterey wk2 both release and debug.

The first failure that I see on the dashboard was 03/28/22 at r292002 for Big Sur and 3/18/2022 at r291501 for Monterey debug and release.  Neither appears relevant to causing this issue.  This test seems to have been flaky since the start.

History:
https://results.webkit.org/?suite=layout-tests&test=scrollingcoordinator%2Fmac%2Ffixed-backgrounds%2Ffixed-background-in-overflow-in-iframe.html&limit=50000

Diff:
--- /Volumes/Data/worker/monterey-release-applesilicon-tests-wk2/build/layout-test-results/scrollingcoordinator/mac/fixed-backgrounds/fixed-background-in-overflow-in-iframe-expected.txt
+++ /Volumes/Data/worker/monterey-release-applesilicon-tests-wk2/build/layout-test-results/scrollingcoordinator/mac/fixed-backgrounds/fixed-background-in-overflow-in-iframe-actual.txt
@@ -14,32 +14,5 @@
     (layout viewport (0,0) width=785 height=600)
     (min layoutViewport origin (0,0))
     (max layoutViewport origin (0,1416))
-    (behavior for fixed 0)
-    (frame hosting node
-      (frame scrolling node
-        (scrollable area size width=500 height=400)
-        (total content size width=500 height=400)
-        (last committed scroll position (0,0))
-        (scrollable area parameters
-          (horizontal scroll elasticity 0)
-          (vertical scroll elasticity 0)
-          (horizontal scrollbar mode 0)
-          (vertical scrollbar mode 0))
-        (synchronous scrolling reasons Has slow repaint objects, Has slow repaint descendant scrollers)
-        (layout viewport (0,0) width=500 height=400)
-        (min layoutViewport origin (0,0))
-        (max layoutViewport origin (0,0))
-        (behavior for fixed 0)
-        (overflow scrolling node
-          (scrollable area size width=405 height=305)
-          (total content size width=410 height=1020)
-          (last committed scroll position (0,0))
-          (scrollable area parameters
-            (horizontal scroll elasticity 0)
-            (vertical scroll elasticity 0)
-            (horizontal scrollbar mode 0)
-            (vertical scrollbar mode 0)
-            (allows horizontal scrolling 1)
-            (allows vertical scrolling 1))
-          (synchronous scrolling reasons Has slow repaint objects))))))
+    (behavior for fixed 0)))

I have updated the marking for this test as flaky failing while this issue is investigated.

Canonical link: https://commits.webkit.org/249642@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@292871

[Ben Schwartz]

Still occurring on Monterey and Ventura.

[Ben Schwartz]

Still occurring on Monterey and Ventura, but now a constant text failure with the same diff.

[Ben Schwartz]

Correction: this is a constant text failure on all configurations of Monterey/Ventura with wk2.

[Ben Schwartz]

This issue regressed to a constant failure at 267516@main, meaning this could be a re-baseline candidate.

[EWS]

Test gardening commit 278431@main (68b1f542c3f0): <https://commits.webkit.org/278431@main>

Reviewed commits have been landed. Closing PR #28210 and removing active labels.